Relay



Jan. 27, 1925. v

E. W. BREISCH RELAY Filed July 9, 1921 m w n E m A Wm 75 2 M j whin a u0 M T 1. a,

3 L m m N W {I Patented Jan. 27, 1925. V

UNITED STATES PATENT OFFICE.

EDGAR W. BREISCH, OF EDGEWOOD PARK, PENNSYLVANIA, ASSIGNOR 'I'O WESTING-HOUSE ELECTRIC & MANUFACTURING COMPANY, A OORE'ORATION OF PENNSYL-VANIA.

RELAY.

Application filed July 9, 1921. Serial No. 483,475. T all 10720221 itmay concern. to be actuated to the position that is con- Be it knownthat I, EDGAR TV. Bronson, trolled by the winding having the lesser acitizen of the United States, and a resident resistance. That winding,however, when of Edgewood Park, in the county of Alenergized, becomes soheated that the 55 legheny and State of Pennsylvania, have resistancethereof increases to a value exinvented a new and useful Improvement inceeding the resistance of the other winding Relays, of which thefollowing is a specifiwhich is disconnected from the circuit and atiois, therefore, de-energized.

My invention relates to electrical con- If the circuit is opened topermit the 60 trolling devices and particularly to electrical relay toreturn to its initial balanced posirelays, tlon and is immediatelyreclosed, the relay One object of my invention is to provide willthereupon be actuated to the position a relay that shall be actuated toone posicontrolled by the second winding, since that tion when it isfirst energized and that shall winding has a lesser value of resistancethan 65 be actuated to another position when it is the heated formerwinding and may, acde-energized and then immediately re-enercordingly,be energized to a greater degree. i d By means of such relay, twocircuits may Another object of my invention is to probe controlled fromadistance through a vide a relay wherein the increase in the singlecircuit and by means of a single con- 70 resistance of a winding, byreason of the trol switch.

heat caused by current traversing the same, Similarly, the relay may beadapted to is employed to produce an unbalance becontrol two circuitsthat normally include tween that winding and another winding, differentvalues of resistance. The windthat shall serve to actuate the relay toanings may be so designed that the electro- 75 other position when theformer winding is magnetic force, or the ampere-turns, prode-energizedand both windings are then duced by one winding shall slightly exceedimmediately re-energized. the electromagnetic force produced by theAnother object of my invention is to proother winding when the windingsare re vide a relay, of the above-indicated charspectively traversed bycurrents of values 80 acter, that may be remotely controlledcorresponding to the resistance values of the through a single conductorand a single condevices in circuit therewith. Thus, the trolling switchto control two separate cirrelay will be actuated to the positionconcuits. trolled by the winding producing the greater A further objectof my invention is to force, and the other winding and its circuit 85provide a system including the above-menwill be disconnected from theenergizing tioned relay whereby two groups of street source. lamps maybe remotely controlled from a After the former winding and its circuitcontrol station through a single circuit by are traversed by current andheated thereby, means of a single control switch. the resistance thereofwill increase and cor- 90 In practicing my invention, I provide arespondingly decrease the currenttraversing relay of the balanced typecomprising two the same. The electromagnetic force of the windings, twostationary contact members first winding will thereupon be decreased toand a movable member that normally ena value less than that normallyproduced gages both stationary contact members, but by the other windingwhich is tie-energized. that is actuated upon the energization of It,therefore, the first winding is de-enereither coil to disengage one ofthe contact gized to permit the relay to return to its members and tomaintain engagement with initial position of balance, and both windtheother contact member. ings are then immediately re-energized, the

By so constructing one of the windings relay will be actuated to theposition conthat it shall have less resistance than the trolled by thesecond winding, that preother, the relay may be caused normally viouslyhas been de-energized.

' Figure 1 is a diagrammatic View of an electrical circuit including therelay e1nbodying my invention.

Fig. 2 is a diagrammatic view of an electricalcircuit embodying, amodified form of the relayshownin Fig. 1,} and i Fig. 3 is adiagrammatic view of a modified circuit including the relay embodying myinvention.

In 6 that normally are lighted during the evening until midnight, and agroup of lamps 7 that are lighted after midnight when the lamps of thegroup 6 are disconnected from the circuit; En'ergyforthe lamps; in bothgroupsis. provided by algenerator. 8, and the circuits.includingthe twogroups are controlled by meansjoiuarelay 91and a switch 10. The switch.10' is illustratedyas a manually-operated switchbut it may be of the.time-controlled type 1 in order 1 to render the operation ofi-the:systemv auto-. matic.=

The relay 9. comprises; two actuating windings 11 and 12, tworelativelystation ary contact .members'13 and 14 anda movable member "15which is controlled by .the windings 11 and 12..to efiect the.engagement between the contactunembers 13 and 14 andcorresponding;contact members 16 and 17, respectively.-

Normally, the contact members 13 and 16 are in engagement. and thecontact members 14 and 17 likewise. Upon the actuationvor' the movablemember 15. .by one of the windings, as, for example, the winding 11,posie titre engagementis effected between thecontact members .13 and16,:lwhilethe contact members 14 and l7 are disengaged.

V The windings; 11 and12-are so designed with .regard'to. theresistances'of the. circuits including the respective groupsfi 'and=7,that the electromagnetic force-produced by? the winding 11 .willvslightly. exceed the electro magnetic .iorceprodu'ced .by'the' winding12 when both-circuits. :aresimultaneously. energized; Upon the closureoi'sgthe: switch 10, therefore, the relay 9 will effect the dis:engagement of the, contact; members 14 and 17 but w1ll maintain thecontact members 7 13 and 16 inlengagement.

Cir

- magneticforce produced .by the The-generator 8 andthe control switch10-are located in a controlstation" and are remotely disposed withrespect'tothe relay Sand the lamps in groups-6 and 7. .lVhen the switch10 is. first ClOSBCl'flDCliIhGQ lamps in group fi'energized, theresistance of the circuit including the winding 11' (and the lampsin'the group-6, isiincreased by reason of the heating developed thereinby the current. Tliecurrent traversing that cirucuit.is,-;therefore,decreased and the-electro winding 11 'iscorrespondingly. decreased to 'avalue that is less than the normal-value of the electro- Fig. 1 areillustrated a group of lamps 12, by reason of the greaterelectromagnetic .force produced by that winding.

By means of the relay describedabove, the two groups of lamps may beremotely controlled through a single circuit by means of the singleswitch 10.

In Fig}; 2 of the accompanying drawings is illustrated a similar circuitthat contains a modified form. of the-relay that is illus-: trated inFig. 1. In this figure: the relay l9 comprises,.in addition to theactuating windings 11 and'12 and the stationary cone.

tact-members 13 and 14,,a flexible conduct ingmember .20 that normallyengagesboth contact members 13 and 14 but. is controlled by means of thepivoted member 21 .upon which i it is mounted to engage only the contactmember 13, when the winding 12 is energized, and only the contactmember 14, when the-winding :11 isenergizedn Otherwise, the operation ofthis relay andthe circuit illustrated is similar tothe operationdescribed in connection. with-the ,cir-. cuitthat is illustratedin-Fig. 1. y

In Fig. 3 of the accompanying drawings is illustrated a circuitincluding the, relay shown in i Fig. 2, but differently connected,whereby the operationot two separate Cir-- cuitsmay-be controlled. froma distance in a-manner similar to that already described; Thewindingll"? of therelay 19 is so.con-. structed of conductingv materialhaving a relatively large temperature coeificient that normallyitsfresistanceis less thanthe .re'-. sistance of the winding 12*.

' lvhen thelswitch .10 is, closed the relay 19. will :be actuated toefiect. engagement: of theflcontact members 14:and 20. A:tter..-thewinding; 11 is. heated and its resistance in-. creased to a valueexceeding theiresistance of the winding 12, engagement of the -con-.tact. members '13 -.and 20 -may .be eifected-by opening and immediatelyreclosing the switch 10; Y

The actuation of the relays 24 and:25may thus be eiie'ctedLas desired,and the opera-. tion of the devicesinthe. corresponding 'circuits may be.controllediby thecorresponding switches- 26. and 27. a i

It will be observedthat, by utilizing the thermalsresistancecharacteristic'ot an electricalconductor, the resistance-0f which,

varies in accordance with the temperature, devices maybesimplycont-rolled fromia distance -.by means of a single circuit; and;a single control switch, and a. large-saving eifec'ted thereby in thecost of conductors.

lOO

My invention isv not limited to the specific construction of the.devices that. are lllllS-r trated, or to the specific arrangementthereof, since they may be variously modified and arranged within thespirit and scope of my invention, as set forth in the appended claims.

I claim as my invention 1. The combination with a source of energy and aplurality of translating devices having temperature-resistancecoeflicients and remotely disposed with respect to said source ofenergy, of a single circuit therebetween, and means responsive to thevariation of the resistance of the translating devices by reason of thetemperature-resistance coefficients thereof for selectively controllingthe connection of the circuit to the several translating devices.

2. The combination with asource of'energy and a plurality of translatingdevices remotely disposed with respect thereto, of a single circuittherebetween and means in said circuit for selectively controlling theconnection of the circuit to one of the devices. comprising meansdependent upon the thermal-resistance characteristics of said devices.

3. The combination with a lighting system comprising two groups oflight-producing devices and a source of energy remotely disposed withrespect thereto, of a balance relay connected between the two groups andthe source of energy, and means for control ling the operation of therelay dependent upon the thermal-resistance characteristics of saiddevices for selectively connecting the source of energy to one of thegroups.

4. The combination with a lighting system comprising two groups oflight-producing devices and a source of energy remotely disposed withrespect thereto, of a balance relay connected between the two groups andthe source of energy, and a circuitcontrolling device between the relayand the source of energy for selectively controlling the operation ofthe relay in accordance with the thermal condition of thelight-producing devices.

5. The combination with a lighting system comprising two groups oflight-producing devices having temperattire-resistance coefficients anda source of energy remotely disposed with respect thereto, of anelectroresponsive device embodying two winnings respectively connectedin circuit with the two groups of light-producing devices and betweenboth groups and the source of en-- er and a switching device in thecircuit between the source of energy and the relay windings forselectively controlling the relay according to thetemperature-resistance coeflicients of the light-producing devices.

6. The combination with two devices embodying temperature-resistancecoefiicients and a source of energy remotely disposed with respectthereto for energizing said devices, of a single conductor therebetweenand means controlled through said conductor and dependent upon saidtemperatureresistance coefiicients for efiecting the connection of thesource of energy through said conductor to either device.

In testimony whereof, I have hereunto subscribed my name this 6th day ofJuly,

EDGAR W. BREISCH.

